diff --git a/weed/command/volume.go b/weed/command/volume.go
index 88aee95ae..b87555456 100644
--- a/weed/command/volume.go
+++ b/weed/command/volume.go
@@ -143,9 +143,9 @@ func (v VolumeServerOptions) startVolumeServer(volumeFolders, maxVolumeCounts, v
 	case "leveldb":
 		volumeNeedleMapKind = storage.NeedleMapLevelDb
 	case "leveldbMedium":
-		volumeNeedleMapKind = storage.NeedleMapBoltDb
+		volumeNeedleMapKind = storage.NeedleMapLevelDbMedium
 	case "leveldbLarge":
-		volumeNeedleMapKind = storage.NeedleMapBoltDb
+		volumeNeedleMapKind = storage.NeedleMapLevelDbLarge
 	}
 
 	masters := *v.masters
diff --git a/weed/storage/needle_map.go b/weed/storage/needle_map.go
index ee31b06f6..92fc06aae 100644
--- a/weed/storage/needle_map.go
+++ b/weed/storage/needle_map.go
@@ -18,8 +18,6 @@ const (
 	NeedleMapLevelDb        // small memory footprint, 4MB total, 1 write buffer, 3 block buffer
 	NeedleMapLevelDbMedium  // medium memory footprint, 8MB total, 3 write buffer, 5 block buffer
 	NeedleMapLevelDbLarge   // large memory footprint, 12MB total, 4write buffer, 8 block buffer
-	NeedleMapBoltDb
-	NeedleMapBtree
 )
 
 type NeedleMapper interface {